Darstellung von Diacylperoxyden und Persäureestern nach der Imidazolidmethode

Abstract

Symmetrische Diacylperoxyde werden durch Acylierung von H2O2 mit Imidazoliden in sehr guten Ausbeuten erhalten. Entsprechend können aus Persäuren mit Imidazoliden unsymmetrische Diacylperoxyde dargestellt werden. Die Darstellung von Persäureestern nach der Imidazolidmethode wird beschrieben.

Unravelling the ultrafast photodecomposition mechanism of dibenzoyl peroxide in solution by time-resolved IR spectroscopy

“…13 C-labelled DBPO ((C 6 H 5 13 CO 2 ) 2 ) was synthesised from the corresponding benzoic acid (C 6 H 5 13 CO 2 H, Aldrich) adopting the imidazolid method. 12 To verify the structural and vibrational properties of DBPO and the corresponding radicals quantum chemical calculations using density functional theory (DFT) were performed with the ORCA program package 13,14 developed by Neese. To enhance the efficiency of the calculations at no significant loss of accuracy, the resolution-of-identity (RI) approximation was invoked.…”

Radical initiators and their influence on the viscosity and molecular weight of acrylic polymers applied in pressure-sensitive adhesives

“…This method is simpler than the double-step method described in [14], because individual processes preparation and separation of acylating agent (acid chloride) are not needed. The double-step procedure was used earlier for the synthezes of esters and peroxyesters [17]. Higher yields of the desired compounds were achieved by using an excess of hydroperoxide.…”

Novel azo-peresters radical initiators used for the synthesis of acrylic pressure-sensitive adhesives

“…Described method of synthesis is simpler than the double step method, due to the lack of individual preparation and separation of acylating agent (acid chloride). This method was used earlier in synthesis of esters and peresters [12]. Higher yields of desired compounds were achieved by using higher excess of hydroperoxide, than described in the literature [12].…”

“…This method was used earlier in synthesis of esters and peresters [12]. Higher yields of desired compounds were achieved by using higher excess of hydroperoxide, than described in the literature [12]. In this method acylating agent is generated in situ by reaction of 1,1′-carbonyldiimidazole with carboxylic acid with azo function.…”